The influence of annealing temperature on hyperfine magnetic field and saturation magnetization of Fe–Si–Al–Cr flake-shaped particles

Atomic-Scale Layer-by-Layer Deposition of FeSiAl@ZnO@Al2O3 Hybrid with Threshold Anti-Corrosion and Ultra-High Microwave Absorption Properties in Low-Frequency Bands

“…1 and S4a. Interestingly, after annealing at 500 ℃, the (111) plane appeared in FSA-based hybrids, suggesting the formation of the DO 3 superlattice structure [ 37 ]. However, the diffraction peaks of Al 2 O 3 and ZnO are not found, which might be due to their lower content and beyond the detection limit of XRD.…”

“…The Ms values of FSA, FSA-500, FSA@Al 2 O 3 , FSA@ZnO, and FSA@ZnO@Al 2 O 3 are 119.4, 134.4, 123.3, 123.5, and 124.4 emu/g, respectively. A slight increase of M s for FSA-based hybrids might attribute to the highly ordered DO 3 superlattice structure [ 37 ]. The H c values obtained in FSA, FSA@Al 2 O 3 , FSA@ZnO, and FSA@ZnO@Al 2 O 3 are about 21.6, 27.0, 7.15, and 22.9 Oe, respectively, which are larger than the bulk Fe (1 Oe) might be due to smaller size [ 42 ].…”

“…These findings are well-supported by the XRD results, where the as-prepared FSA@Al 2 O 3 , FSA@ZnO, and FSA@ZnO@Al 2 O 3 present an obvious diffraction peak of DO 3 (111) compared to FSA, indicating the presence of a higher magnetic ordered phase of FSA-based hybrids. On the other hand, the highly ordered DO 3 phase is contributed to acquiring stronger magnetic behavior [ 37 ]. Figure 3 f shows magnetic loss tangents (tan δ M ) of the complex permeability for FSA and FSA-based absorbers, the tan δ M values of FSA@Al 2 O 3 and FSA@ZnO are close to that of FSA.…”

Phase Engineering of High‐Entropy Alloys

“…Magnetic field plays a vital role in the formation of specific microstructures in the aspect of thermodynamics or kinetics 134. Under the high magnetic fields, atoms are magnetized to exhibit different behaviors 135,136. Ghazisaeidi et al discovered that Mn in the CrMnFeCoNi HEA eliminated the energy difference between FCC phase and HCP phase 28.…”

“…More importantly, the strong magnetic field delivers high energy to atoms directly, which promotes atomic arrangement, matching, and migration. Zhang et al found the mass transport of phase transition was controlled by a magnetic field 135. They found that an acceleration of atomic diffusion was caused by applying magnetic field, which facilitated coarsening of the secondary phase on the grain boundary.…”